Can a commercial lease be broken by the tenant due to critical health issues?

I have 2 yrs left on a 5 yr commerical lease. I've been battling cancer all summer and haven't been able to work. It looks like I won't be going back to work any time soon. I cannot run my business and need to break my lease. I have been asking for rent relief for months, but have been refused. Due to the ever increasing cost of my care, my finances are wiped out and I cannot afford to "buy out" my lease nor can I afford to contiue to pay rent until they re-rent the space. My landlord's only offer is one year of full rent. My landlord does not know about my health issues, only that my business has suffered great financial losses. Do I have any options?